5h-9=3h+21

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Solution for 5h-9=3h+21 equation: 



5h-9=3h+21

We move all terms to the left:

5h-9-(3h+21)=0

We get rid of parentheses

5h-3h-21-9=0

We add all the numbers together, and all the variables

2h-30=0

We move all terms containing h to the left, all other terms to the right

2h=30

h=30/2

h=15

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